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Tap water quality report

La Crescenta, CA

EPA monitoring detected 20 contaminants across the 1 water supplier serving La Crescenta. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
35,841
people served
20
contaminants found
California rankings Lead in California PFAS in California

What was found in La Crescenta's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
TTHM
100 µg/L 125%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Copper
73 µg/L 5.6%
of the EPA limit 1300 µg/L
 1/1 SYR4
Lithium
45 µg/L
No EPA limit set
 1/1 UCMR-5
Total Haloacetic Acids (HAA5)
37 µg/L 62%
of the EPA limit 60 µg/L
 1/1 SYR4
Bromodichloromethane
35 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
34 µg/L
No EPA limit set
 1/1 SYR4
Chloroform
32 µg/L
No EPA limit set
 1/1 SYR4
Bromoform
21 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
15 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
14 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
12 µg/L
No EPA limit set
 1/1 SYR4
Lead
7.4 µg/L 49%
of the EPA limit 15 µg/L
 1/1 SYR4
Monobromoacetic Acid
6.6 µg/L
No EPA limit set
 1/1 SYR4
Pfhxa
0.0080 µg/L
No EPA limit set
 1/1 UCMR-5
Pfpea
0.0080 µg/L
No EPA limit set
 1/1 UCMR-5
PFBS
0.0068 µg/L
No EPA limit set
 1/1 UCMR-5
PFOA
0.0051 µg/L
No EPA limit set
 1/1 UCMR-5
PFHXS
0.0049 µg/L
No EPA limit set
 1/1 UCMR-5
Pfhpa
0.0031 µg/L
No EPA limit set
 1/1 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving La Crescenta

SupplierPopulation served
CRESCENTA VALLEY CWD 35,841

Frequently asked questions about La Crescenta tap water

Is La Crescenta tap water safe to drink?

EPA testing detected 20 contaminants in the water serving La Crescenta. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve La Crescenta?

1 public water supplier report drinking-water monitoring for La Crescenta, California to the EPA. Each is listed above with its population served.

What contaminants are in La Crescenta's water?

The contaminants EPA monitoring detected in La Crescenta include TTHM, Copper, Lithium, Total Haloacetic Acids (HAA5), Bromodichloromethane. The full list, with the highest level found and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.